Hardware Redundant Array of Independent Disks
Support

Sun Cluster systems support the use of hardware Redundant Array of
Independent Disks (RAID) and host-based software RAID. Hardware RAID uses
the storage array's or storage system's hardware redundancy to ensure that
independent hardware failures do not impact data availability. If you mirror
across separate storage arrays, host-based software RAID ensures that independent
hardware failures do not impact data availability when an entire storage array
is offline. Although you can use hardware RAID and host-based software RAID
concurrently, you need only one RAID solution to maintain a high degree of
data availability.